It would depend on how many spots I had, but what I'd most likely do is let them soak a few minutes under a rag or paper towel with warm dish detergent solution on it, then use a cotton swab in a dremel tool, with polishing synthetic wax on it. I'd test an inconspicuous area and examine with a flashlight before proceeding. When I was done I'd wax the whole vehicle, should make getting them off easier next time.